Home / 207,545.05-311,119.03-81,143.28

Finding the Fourth Proportional to 207,545.05, 311,119.03 and 81,143.28

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Solution

The fourth proportional to 207,545.05, 311,119.03 and 81,143.28 is: 121,637.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,545.05 : 311,119.03 = 81,143.28 : x
  2. Step 2: Convert to fraction form
    207,545.05/311,119.03 = 81,143.28/x
  3. Step 3: Cross multiply
    207,545.05x = 311,119.03 × 81,143.28
  4. Step 4: Simplify right side
    207,545.05x = 25,245,219,160.61
  5. Step 5: Solve for x
    x = 25,245,219,160.61/207,545.05
  6. Step 6: Final answer
    x = 121,637.30

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.